LIFTING SYSTEM OF DRILLING INSTALLATION Russian patent published in 2018 - IPC E21B19/02 

FIELD: machine building.

SUBSTANCE: invention relates to the field of engineering, in particular to the lifting system of drilling rigs for production and exploration drilling of oil and gas wells. Lifting system of the drilling rig contains a winch with working and emergency brakes, a rope thrown over the crown block and a traveling block. Crown block includes an axis with pulleys, a frame and a casing installed with a guaranteed clearance relative to the pulleys and the rope and fixed to the frame. Axis of the crown block with pulleys is provided with a body, the frame and the body are provided with vertical guides made in response to each other, the inner surface of the casing mating the ends of the pulleys and the rope, the body is spring-loaded relative to the frame and installed with the possibility of limited vertical movement and alternate interaction of the body with the end of the frame and pulleys and the rope with the casing.

EFFECT: technical result consists in eliminating the weakening of the movable rope branch and the violation of its winding on the drum during emergency braking of the winch.

3 cl, 5 dwg